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Abstract

Summary

Saline aquifers are considered to be the major targets to inject CO2 for many Geological Carbon Storage (GCS) projects. To achieve public acceptance and to estimate CO2 storage capacity adequately, the comprehensive understanding of regional groundwater flows is important since groundwater flow eventually affects containment of injected CO2 and can relate boundary conditions in numerical CO2 flow simulation.

In this presentation, we present a case study of the regional groundwater hydrogeological modelling conducted for the Kanto Plain in Japan, where is selected as one of the potential candidates for large scale GCS projects by JOGMEC. This region is one of the largest depositional basins in Japan and encompasses the Tokyo metropolitan area where contains significant CO2 emission sources.

We first compiled and analyzed numerous kinds of published information around this area related to groundwater flow characteristics, including chemical properties. Subsequently, we built a comprehensive numerical simulation model being consistent with these data.

The results of our numerical simulation confirmed that the groundwater flow velocity in the lower Pleistocene and below formations is very low, several to ten millimeters per year, and in terms of groundwater flow, these formations are preferred for GCS in this area.

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/content/papers/10.3997/2214-4609.202474010
2024-08-12
2026-02-19
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